Flow error adjustment mechanism, method and helical vane water meter

Abstract

The application provides a flow error adjusting mechanism, a method and a spiral-wing water meter, relates to the technical field of water meters, and provides the flow error adjusting mechanism which is suitable for the spiral-wing water meter and comprises an adjusting component I installed on a rectifier.The adjusting component I comprises: an adjusting sheet I and an adjusting part I connected with the adjusting sheet I; the adjusting sheet I is movably connected with the rectifier; the adjusting part I adjusts the swing of the adjusting sheet I, the water flow inclination angle through the rectifier can be changed, the water flow impact intensity on the impeller of the spiral-wing water meter can be adjusted, the range of the flow error adjustment is expanded, and the flow error curve is smoother.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water meters, in particular to a flow error adjusting mechanism, method and screw-wing water meter. BACKGROUND

[0002] The screw-wing water meter usually adopts a gate type error adjusting mode, the gate opening is adjusted to change the flow area of the shunt flow channel, the flow error of the water meter is adjusted when the flow through the impeller is constant, so as to realize the adjustment of the flow error of the water meter. If the error adjusting precision is improved, a smaller size gate needs to be configured to realize the fine adjustment of the flow error, but the adjustment range of the flow error will be limited. Moreover, the gate type error adjusting mechanism has a large difference in adjusting effect under different flow rates, and the error adjusting effect for large flow rate is very small, which is difficult to calibrate the flow rate of the water meter; the error adjusting precision for small flow rate is low, and the error curve is not smooth, which increases the difficulty of checking the flow error of the water meter. SUMMARY

[0003] The present application aims to provide a flow error adjusting mechanism, method and screw-wing water meter to alleviate the technical problems of limited error adjusting range and non-smooth error curve of the screw-wing water meter.

[0004] In a first aspect, the present application provides a flow error adjusting mechanism suitable for a screw-wing water meter, the flow error adjusting mechanism comprising an adjusting assembly I installed on a rectifier;

[0005] The adjusting assembly I comprises an adjusting piece I and an adjusting part I connected to the adjusting piece I;

[0006] The adjusting piece I is movably connected to the rectifier;

[0007] The adjusting part I is used to adjust the swing of the adjusting piece I to change the water flow angle through the rectifier.

[0008] In combination with the first aspect, the present application provides a first possible implementation manner of the first aspect, wherein the adjusting part I comprises an adjusting ring rotatably connected to the rectifier;

[0009] The adjusting piece I is pivotally connected to the rectifier about an axis extending radially along the adjusting ring, and the adjusting ring is hinged to the adjusting piece I.

[0010] In combination with the first possible implementation manner of the first aspect, the present application provides a second possible implementation manner of the first aspect, wherein the adjusting piece I is provided in plurality, and the plurality of adjusting pieces I are arranged in a circumferential direction along the adjusting ring.

[0011] In conjunction with the first possible implementation of the first aspect, the present invention provides a third possible implementation of the first aspect, wherein the adjusting member I further includes: shaft member I, swing arm and transmission member;

[0012] One end of the swing arm is connected to the shaft I, the transmission component is slidably hinged to the other end of the swing arm, and the transmission component is connected to the adjusting ring.

[0013] In conjunction with the third possible implementation of the first aspect, the present invention provides a fourth possible implementation of the first aspect, wherein the transmission component includes: a pivot pin, an arm, and a swing shaft;

[0014] One end of the arm is connected to the pivot pin, and the other end of the arm is connected to the swing shaft. The pivot pin is parallel to the swing shaft and is slidably hinged to the swing arm. The swing shaft is connected to the adjusting ring.

[0015] In conjunction with the first aspect, the present invention provides a fifth possible implementation of the first aspect, wherein the rectifier is mounted on a bracket, and the bracket is provided with a rectifier port, a branch port I, and a branch port II;

[0016] The rectifier is installed at the rectifier port;

[0017] The flow error adjustment mechanism further includes: adjustment component II and adjustment component III;

[0018] The adjustment component II is installed at the branch intersection I to adjust the flow cross-sectional area of ​​the branch intersection I;

[0019] The adjustment component Ⅲ is installed at the branch intersection Ⅱ to adjust the flow cross-sectional area of ​​the branch intersection Ⅱ.

[0020] In conjunction with the fifth possible implementation of the first aspect, the present invention provides a sixth possible implementation of the first aspect, wherein the adjusting component II includes: an adjusting piece II and an adjusting member II;

[0021] The adjusting piece II is slidably connected to the bracket, and the adjusting piece II shields the branch intersection I;

[0022] The adjusting member II is connected to the bracket or the adjusting piece II, and the adjusting member II is used to adjust and lock the adjusting piece II.

[0023] In conjunction with the fifth possible implementation of the first aspect, the present invention provides a seventh possible implementation of the first aspect, wherein the adjustment component III includes: an adjustment piece III and an adjustment element III;

[0024] The adjusting plate III is rotatably connected to the bracket, and the adjusting plate III shields the branch intersection II;

[0025] The axis of rotation of the adjusting plate III is parallel to the adjusting plate III, or the axis of rotation of the adjusting plate III coincides with the adjusting plate III;

[0026] The adjusting member III is connected to the bracket and / or the adjusting piece III, and the adjusting member III is used to adjust and lock the adjusting piece III.

[0027] In a second aspect, the spiral water meter provided by the present invention includes: a casing, an impeller, and the flow error adjustment mechanism described in the first aspect;

[0028] The watch case has an inlet and an outlet, the impeller is installed inside the watch case, and the impeller is driven to rotate by the water flow from the inlet to the outlet;

[0029] The rectifier is installed between the inlet and the impeller, and the adjusting vane I is opposite to the blades of the impeller.

[0030] Thirdly, the flow error adjustment method provided by the present invention is applicable to a rotor-type water meter, and adopts the flow error adjustment mechanism described in the first aspect;

[0031] The flow error adjustment method includes: adjusting the rotation of the adjusting plate I by adjusting the adjusting component I to change the angle between the water flowing through the rectifier and the blades of the impeller.

[0032] The embodiments of the present invention bring the following beneficial effects: The adjustment component I installed on the rectifier includes an adjustment plate I and an adjustment element I connected to the adjustment plate I. The adjustment plate I is movably connected to the rectifier. By adjusting the rotation of the adjustment plate I through the adjustment element I, the tilt angle of the water flow through the rectifier can be changed, thereby adjusting the water flow impact force on the impeller of the rotor water meter, expanding the range of flow error adjustment, and making the flow error curve smoother.

[0033] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of the present invention, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 A schematic diagram of the flow error adjustment mechanism and a schematic diagram of the flange of the rotor water meter provided in the embodiment of the present invention;

[0036] Figure 2 A schematic diagram and a cross-sectional view of the flange of the flow error adjustment mechanism of the rotor water meter provided in an embodiment of the present invention;

[0037] Figure 3 A schematic diagram of the rectifier and regulating component I of the flow error regulating mechanism provided in an embodiment of the present invention;

[0038] Figure 4 A schematic diagram of the adjustment component I of the flow error adjustment mechanism provided in an embodiment of the present invention;

[0039] Figure 5 A schematic diagram of the flow error adjustment mechanism provided in an embodiment of the present invention;

[0040] Figure 6 A schematic diagram of the support for the flow error adjustment mechanism provided in an embodiment of the present invention;

[0041] Figure 7 An exploded view of the adjustment component II of the flow error adjustment mechanism provided in an embodiment of the present invention;

[0042] Figure 8 A schematic diagram of the adjustment component III of the flow error adjustment mechanism provided in an embodiment of the present invention;

[0043] Figure 9 This is a cross-sectional view of a rotor-type water meter provided in an embodiment of the present invention.

[0044] Icons: 100 - Adjustment Component I; 110 - Adjustment Plate I; 120 - Adjustment Part I; 121 - Adjustment Ring; 122 - Shaft I; 123 - Swing Arm; 124 - Transmission Component; 1241 - Shaft Pin; 1242 - Arm Rod; 1243 - Swing Shaft; 125 - Baffle Plate; 200 - Rectifier; 300 - Bracket; 301 - Rectifier Port; 302 - Branch Port I; 303 - Branch Port II; 304 - Slide Groove; 400 – Adjusting component II; 410 – Adjusting plate II; 411 – Rack; 420 – Adjusting element II; 421 – Gear; 422 – Shaft II; 423 – First plug cap; 500 – Adjusting component III; 510 – Adjusting plate III; 520 – Adjusting element III; 521 – Shaft III; 522 – Second plug cap; 600 – Case; 601 – Inlet; 602 – Outlet; 700 – Impeller; 800 – Flange. Detailed Implementation

[0045] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used only to describe differences in name and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities in the International System of Units (SI), or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the flow error adjustment mechanism provided in this embodiment of the invention is applicable to a rotor-type water meter. The flow error adjustment mechanism includes an adjustment assembly I100 installed on the rectifier 200. The adjustment assembly I100 includes an adjustment plate I110 and an adjustment member I120 connected to the adjustment plate I110. The adjustment plate I110 is movably connected to the rectifier 200. The adjustment member I120 is used to adjust the rotation of the adjustment plate I110 to change the water flow angle through the rectifier 200.

[0049] In an optional embodiment, the adjusting member I120 can be configured as a connecting rod, which drives the adjusting plate I110 to swing by pushing and pulling to change the water flow angle. Alternatively, the connecting rod can be driven by a slider slidably fitted to the bracket 300. The slider can be manually operated and its position is locked by the friction between the slider and the bracket 300. The adjusting member I120 may also include a bolt and a spring. Tightening the bolt pushes the adjusting plate I110 to swing. The spring is installed between the adjusting plate I110 and the bracket 300 and can drive the adjusting plate I110 to swing in the opposite direction. The swing angle of the adjusting plate I110 can be changed by tightening or loosening the bolt.

[0050] In this embodiment, the adjusting member I120 includes an adjusting ring 121 rotatably connected to the rectifier 200; the adjusting plate I110 is pivotally connected to the rectifier 200 about an axis extending radially along the adjusting ring 121, and the adjusting ring 121 and the adjusting plate I110 are hinged.

[0051] Specifically, the regulating ring 121, rectifier 200, and impeller 700 are coaxially arranged. The regulating vane I 110 is offset from the axis of the regulating ring 121, and the axis of rotation of the regulating vane I 110 is approximately parallel to the radial direction of the regulating ring 121. When the regulating ring 121 rotates relative to the rectifier 200 around its own axis, the regulating ring 121 can drive the regulating vane I 110 to rotate, thereby changing the angle between the regulating vane I 110 and the section perpendicular to the axis of the rectifier 200. This changes the impact force of the water flow on the blades of the impeller 700 under the same flow velocity conditions, and thus changes the rotational speed of the impeller 700. When the flow rate is represented by the number of rotations of the impeller 700, the flow rate error can be calibrated.

[0052] Furthermore, multiple regulating vanes I110 are provided, and these multiple regulating vanes I110 are spaced apart circumferentially along the regulating ring 121. Specifically, the multiple regulating vanes I110 are evenly distributed circumferentially along the regulating ring 121, and the multiple regulating vanes I110 can be adjusted to deflect synchronously by the regulating ring 121, which can ensure that when the water flow impacts the impeller 700, the impact force on the impeller 700 is evenly distributed circumferentially.

[0053] like Figure 2 , Figure 3 and Figure 4 As shown, the adjusting component I120 also includes: shaft I122, swing arm 123 and transmission component 124; one end of the swing arm 123 is connected to the shaft I122, the transmission component 124 is slidably hinged to the other end of the swing arm 123, and the transmission component 124 is connected to the adjusting ring 121.

[0054] The swing arm 123 can be driven to rotate by rotating the shaft I 122. The swing arm 123 drives the transmission component 124. The transmission component 124 can drive the adjustment ring 121 to rotate by gear transmission or by friction on the outer circumference of the adjustment ring 121.

[0055] In addition, a baffle 125 is installed on the bracket 300. The baffle 125 abuts against the top of the swing arm 123 and the baffle 125 is fitted to the circumferential surface of the shaft I 122, thereby limiting and fixing the swing arm 123 and the shaft I 122.

[0056] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, in an optional embodiment, the transmission component 124 includes: a pin 1241, an arm 1242, and a swing shaft 1243; one end of the arm 1242 is connected to the pin 1241, and the other end of the arm 1242 is connected to the swing shaft 1243. The pin 1241 is parallel to the swing shaft 1243, the pin 1241 is slidably hinged to the swing arm 123, and the swing shaft 1243 is connected to the adjusting ring 121.

[0057] Specifically, the bracket 300 is provided with a slide groove 304, and the swing shaft 1243 is slidably engaged in the slide groove 304. When the swing arm 123 is driven to swing, the swing arm 123 can drive the swing shaft 1243 to slide along the slide groove 304, which in turn can drive the arm 1242 to move laterally. The arm 1242 drives the swing shaft 1243, thereby actuating the adjusting ring 121 to rotate.

[0058] like Figure 1 , Figure 6 and Figure 9 As shown, the rectifier 200 is mounted on the bracket 300, which has a rectifier port 301, a branch port I 302, and a branch port II 303. The rectifier 200 is mounted on the rectifier port 301. The flow error adjustment mechanism also includes an adjustment component II 400 and an adjustment component III 500. The adjustment component II 400 is mounted on the branch port I 302 to adjust the flow cross-sectional area of ​​the branch port I 302, and the adjustment component III 500 is mounted on the branch port II 303 to adjust the flow cross-sectional area of ​​the branch port II 303.

[0059] The flow error adjustment mechanism is installed inside the housing 600. The rectifier port 301, branch port I 302 and branch port II 303 are all located between the inlet port 601 and the outlet port 602. A portion of the water flows through the rectifier port 301 and passes through the rectifier 200, and the angle of the water flow relative to the impeller blades is adjusted by the adjustment component I 100. The other portion of the water flows to the outlet port 602 through the branch port I 302 and the branch port II 303 respectively. The diversion flow rate is adjusted by the adjustment component II 400 and the adjustment component III 500 respectively, thereby increasing the flow measurement range.

[0060] like Figure 1 , Figure 6 and Figure 7As shown, the adjustment assembly II 400 includes: an adjustment plate II 410 and an adjustment member II 420; the adjustment plate II 410 is slidably connected to the bracket 300 and the adjustment plate II 410 covers the branch entrance I 302; the adjustment member II 420 is connected to the bracket 300 or the adjustment plate II 410 and the adjustment member II 420 is used to adjust and lock the adjustment plate II 410.

[0061] In an optional embodiment, the adjusting member II 420 may include a bolt connected to the adjusting piece II 410, and the bolt is slidably engaged with a slide rail on the bracket 300. Loosening the bolt allows it to slide along the slide rail, thereby moving the adjusting piece II 410 within the branch opening I 302, thus changing the area of ​​the branch opening I 302 covered by the adjusting piece II 410. After adjustment, the bolt can be tightened to lock the adjusting piece II 410. In addition, the adjusting member II 420 may also include a snap-fit ​​component. When the adjusting piece II 410 slides into place, the snap-fit ​​component fixes the adjusting piece II 410 to the bracket 300, thereby locking the adjusting piece II 410.

[0062] In this embodiment, the adjusting plate II 410 is connected to a rack 411, and the adjusting member II 420 includes a gear 421 and a shaft II 422 connecting the gear 421. Rotation of the shaft II 422 drives the gear 421, which meshes with the rack 411, thereby driving the adjusting plate II 410 to slide relative to the bracket 300, thus changing the area of ​​the adjusting plate II 410 covering the branch opening I 302. Furthermore, a first plug 423 is threaded onto the shaft II 422. Tightening the first plug 423 allows it to abut against the bracket 300, thereby achieving relative locking between the shaft II 422, the first plug 423, and the bracket 300.

[0063] like Figure 1 , Figure 6 and Figure 8 As shown, the adjustment assembly Ⅲ500 includes: an adjustment plate Ⅲ510 and an adjustment member Ⅲ520; the adjustment plate Ⅲ510 is rotatably connected to the bracket 300, and the adjustment plate Ⅲ510 shields the branch entrance Ⅱ303; the swivel axis of the adjustment plate Ⅲ510 is parallel to the adjustment plate Ⅲ510, or the swivel axis of the adjustment plate Ⅲ510 coincides with the adjustment plate Ⅲ510; the adjustment member Ⅲ520 connects the bracket 300 and / or the adjustment plate Ⅲ510, and the adjustment member Ⅲ520 is used to adjust and lock the adjustment plate Ⅲ510.

[0064] In an optional embodiment, the adjusting member III 520 is connected to the bracket 300 or the adjusting plate III 510, or the bracket 300 and the adjusting plate III 510 are respectively connected to the adjusting member III 520. The adjusting member III 520 may be a bolt or a snap fastener, one of the bracket 300 and the adjusting plate III 510 is connected to the bolt or snap fastener, and the bolt or snap fastener abuts against the other of the bracket 300 and the adjusting plate III 510, thereby locking the adjusting plate III 510 relative to the bracket 300.

[0065] In this embodiment, the adjusting member Ⅲ520 includes: a shaft Ⅲ521 and a second plug 522 connected to the shaft Ⅲ521. The shaft Ⅲ521 is rotatably connected to the bracket 300, and one end of the shaft Ⅲ521 is connected to the adjusting piece Ⅲ510. Twisting the shaft Ⅲ521 causes the adjusting piece Ⅲ510 to swing around the axis of the shaft Ⅲ521, thereby changing the area of ​​the adjusting piece Ⅲ510 that covers the branch entrance Ⅱ303. By tightening the second plug 522, the second plug 522 can abut against the bracket 300, thereby locking the shaft Ⅲ521 and preventing the shaft Ⅲ521 and the second plug 522 from rotating relative to the bracket 300.

[0066] like Figure 1 , Figure 2 , Figure 7 and Figure 8 As shown, regulating component I100 can adjust the impact force on the impeller 700 blades, regulating component II400 adjusts the flow area of ​​branch outlet I302 by translating regulating plate II410, and regulating component III500 adjusts the flow area of ​​branch outlet II303 by tilting regulating plate III510. The regulating accuracy of regulating components II400 and III500 increases progressively. The combined use of regulating components I100, II400 and III500 can not only expand the error adjustment range, but also make the flow performance curve of the water meter smoother.

[0067] like Figure 1 , Figure 2 , Figure 7 and Figure 8 and Figure 9 As shown, the spiral vane water meter provided in this embodiment of the invention includes: a housing 600, an impeller 700, and a flow error adjustment mechanism described in the above embodiment; the housing 600 has an inlet 601 and an outlet 602, the impeller 700 is installed inside the housing 600, and the impeller 700 is driven to rotate by the water flow from the inlet 601 to the outlet 602; a rectifier 200 is installed between the inlet 601 and the impeller 700, and the adjusting plate I110 is opposite to the blades of the impeller 700.

[0068] During assembly, the rectifier 200, regulating component II 400, regulating component III 500 and impeller 700 are respectively installed on the bracket 300. Then the assembly is installed inside the housing 600 and positioned between the inlet 601 and the outlet 602. The flange 800 is installed on the top of the housing 600 and the bracket 300 is pressed and fixed by the flange 800.

[0069] The rotor-type water meter described in this embodiment has the technical effects of the aforementioned flow error adjustment mechanism, which is beneficial to improving the flow accuracy and adjustable range of the water meter, and will not be elaborated further here.

[0070] The flow error adjustment method provided in this embodiment of the invention is applicable to a rotor-type water meter and employs the flow error adjustment mechanism described in the above embodiments. The flow error adjustment method includes: adjusting the rotation of the adjusting plate I110 via adjusting component I120 to change the angle between the water flow passing through the rectifier 200 and the blades of the impeller 700. Furthermore, the flow error adjustment method also includes driving and locking the adjusting plate II410 via adjusting component II420, and driving and locking the adjusting plate III510 via adjusting component III520. Adjusting components II400 and III500 mainly adjust small flow errors, and their combination can achieve a larger adjustment range. Adjusting component I100 mainly adjusts large flow errors. The combined use of adjusting components I100, II400, and III500 not only expands the error adjustment range but also makes the flow performance curve of the water meter smoother.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flow error adjustment mechanism, suitable for a rotor-type water meter, characterized in that, The flow error adjustment mechanism includes adjustment component I (100) installed on the rectifier (200); The adjustment assembly I (100) includes: an adjustment piece I (110) and an adjustment member I (120) connected to the adjustment piece I (110); The regulating plate I (110) is movably connected to the rectifier (200); The adjusting element I (120) is used to adjust the swing of the adjusting plate I (110) to change the angle of the water flow through the rectifier (200); The adjusting member I (120) includes an adjusting ring (121) rotatably connected to the rectifier (200); the adjusting plate I (110) is pivotally connected to the rectifier (200) about an axis extending radially along the adjusting ring (121), and the adjusting ring (121) is hinged to the adjusting plate I (110); The adjusting component I (120) further includes: shaft I (122), swing arm (123) and transmission component (124); one end of the swing arm (123) is connected to the shaft I (122), the transmission component (124) is slidably hinged to the other end of the swing arm (123), and the transmission component (124) is connected to the adjusting ring (121); The rectifier (200) is mounted on a bracket (300), which is provided with a rectifier port (301), a branch port I (302) and a branch port II (303); the rectifier (200) is mounted on the rectifier port (301); the flow error adjustment mechanism further includes: adjustment component II (400) and adjustment component III (500); the adjustment component II (400) is mounted on the branch port I (302) to adjust the flow cross-sectional area of ​​the branch port I (302); the adjustment component III (500) is mounted on the branch port II (303) to adjust the flow cross-sectional area of ​​the branch port II (303).

2. The flow error adjustment mechanism according to claim 1, characterized in that, Multiple adjustment plates I (110) are provided, and the multiple adjustment plates I (110) are arranged at intervals along the circumferential direction of the adjustment ring (121).

3. The flow error adjustment mechanism according to claim 1, characterized in that, The transmission component (124) includes: a pivot pin (1241), an arm (1242), and a swing shaft (1243). One end of the arm (1242) is connected to the pivot pin (1241), and the other end of the arm (1242) is connected to the swing shaft (1243). The pivot pin (1241) is parallel to the swing shaft (1243), and the pivot pin (1241) is slidably hinged to the swing arm (123). The swing shaft (1243) is connected to the adjusting ring (121).

4. The flow error adjustment mechanism according to claim 1, characterized in that, The adjustment assembly II (400) includes: adjustment plate II (410) and adjustment element II (420); The adjusting plate II (410) is slidably connected to the bracket (300), and the adjusting plate II (410) shields the branch intersection I (302). The adjusting member II (420) is connected to the bracket (300) or the adjusting piece II (410), and the adjusting member II (420) is used to adjust and lock the adjusting piece II (410).

5. The flow error adjustment mechanism according to claim 1, characterized in that, The adjustment assembly III (500) includes: an adjustment plate III (510) and an adjustment element III (520); The adjusting plate III (510) is rotatably connected to the bracket (300), and the adjusting plate III (510) shields the branch intersection II (303). The axis of rotation of the adjusting plate III (510) is parallel to the adjusting plate III (510), or the axis of rotation of the adjusting plate III (510) coincides with the adjusting plate III (510); The adjusting member III (520) is connected to the bracket (300) and / or the adjusting piece III (510), and the adjusting member III (520) is used to adjust and lock the adjusting piece III (510).

6. A spiral-bladed water meter, characterized in that, include: The housing (600), the impeller (700), and the flow error adjustment mechanism according to any one of claims 1-5; The housing (600) has an inlet (601) and an outlet (602), the impeller (700) is installed inside the housing (600), and the impeller (700) is driven to rotate by the water flow from the inlet (601) to the outlet (602); The rectifier (200) is installed between the inlet (601) and the impeller (700), and the adjusting plate I (110) is opposite to the blades of the impeller (700).

7. A method for adjusting flow rate error, characterized in that, The flow error adjustment method is applicable to rotor water meters and employs the flow error adjustment mechanism described in any one of claims 1-5; The flow error adjustment method includes: adjusting the swing of the adjusting plate I (110) by adjusting the adjusting component I (120) to change the angle between the water flow through the rectifier (200) and the blades of the impeller (700).

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